Coating machine



Jan. 2, 1945. J H 'MURCH ETAL 2,366,210

COATING MACHINE J. H. MURCH l-AL y COATI'NG MACHINE Filed July 12, 1940Jan. 2, 1945;?

5 Sheets-Sheet 5 7- xbg I. VENTORS Janz 1945- J. H. MURcH ETAL y2,366,210 t H coATING MACHINE l Jan. 2, 1945. J. H, MURCH TAL 2,366,210

COATING MACHINE s; v mma@ ATTORNEYS Patented Jan. 2, 1945 CATIN GMACHINE John H. Murch, East Orange, Ronald E. J. Nordquist, Maplewood,and Elof Nordstrom, East Orange, N. J., assignors to American CanCompany, New York, N. Y., a corporation of NewA Jersey Application July12, 1940, Serial No. 345,232

'z claims.

The present invention relates to a coating machine for applying a lm offluid coating substance to a web of material passed `between a pressureroller and an applyingroller operating in a bath of the coatingsubstance and has particular reference to mountings for the' rollers sothat they may be independently moved free of the bath for cleaningpurposes.`

An object of the invention is the provision of a coating machine havinga pressure roller and an applying roller between which a web of materialis passed to receive a coating of a fluid substance wherein the rollersare carried in subframes which independently may be swung clear of thebath so that the rollers and the bath may be readily cleaned.

Another object is the provision of such a machine wherein the rollersub-frames are tted with devices which may be manually operated tofacilitate shifting of the rollers independently of each other into andout of operating position.

Numerous other objects and advantages of the invention will be apparentas it is better understood from the following description, which, takenin connection with the accompanying drawings, discloses a preferredembodiment thereof.

Referring to the drawings:

Figure 1 is a top plan view of a machine embqdying the instant inventionand showing a web of material in the machine, with parts broken away;

Fig. 2 is a side elevation as viewed from the left in Fig. 1;

Fig. 3 is a fragmentary sectionalview taken substantially along thebroken line 3-3 in Fig. 1;

Fig. 4 is a sectional view taken substantially along the broken line 4-4in Fig. 1, the view showing certain parts in a different position;

Fig. 5 is a transverse sectional view taken substantially along the line5-5 in Fig. 1;

Fig. 6 is a longitudinal section taken substantially along the line I-Sin Fig. 1; and

Fig. 'I is a plan section taken substantially along the line 1-1 in Fig.2.

As a preferred embodiment of the invention the drawings illustrate an`adhesive applying machine in which a strip A (Figs. 1 and 6) of webmaterial, such as fibre or the like, is imprintedl with a thermoplasticadhesive applied in a desired pattern as the web is advanced through themachine. The strip or web may be substantially continuous and may be fedinto and away from the machine in any suitable manner.

While in the machine, the web is fed by upper and lower cooperatingrollers between which the web passes. These rollers constitute anadhesive applying rollerII (Figs. 3 and 6) and a pressure roller I2. Thepressure roller I2 presses the movingweb against the applying roll II.During its travel through the machine the web is held taut by an idlerroller I3. l

The adhesive applying roller Il is preferably of the intaglio type androtates in a bath of heated thermoplastic adhesive maintained in liquidform which is picked up by the roller and is carried toward the web asthe roller revolves. All of this picked-up adhesive except thatcontained within the pockets or intaglio recesses of the. roller isscraped oifby a doctor blade I5 which bears upon the periphery of theintaglio roller. It is this retained adhesive which is applied to themoving web in the pattern laid out on the surface of the intaglioroller. V

The applying or intaglio roller II is formed with trunnions 2I (Figs. 3and 7) whichare journaled in bearing blocks 22 secured to pivotalmountings or sub-frames 23 (see also Fig. 4). There is one of thesesub-frames adjacent each end of the roller and they are mounted on shortpivot pins 24 carried in side frames 25 which constitute the main frameof the machine. These side frames are secured to a machine base 26.

The intaglio rol1 II rotatesin the heated adhesive which is contained inan open top reservoir or receptacle 28. This receptacle is disposedbetween the side frames 25 and is mounted on brackets 29 secured to themachine base 264. The adhesive may be maintained in a hot fluidcondition in any suitable manner, preferably by hot oil which iscirculated through a heating chamber 3| enclosed by a casing 32 formedon the bottom of the receptacle.

4Circulation of the oil through the heating chamber is preferablyeifected by way of an inlet pipe 34 and an outlet pipe 35 the machineends of which are threaded into the casing 32,. The inlet pipe 34 leadsfrom any suitable source of the heated oil while the outlet pipe 35 mayreturn to the oil source or may lead to any suitable place of dischargefor the used oil.

The intaglio roller II is itself heated to facilitate maintenance oftheadhesive in its fluid condition and this is preferably brought about bycirculating a fluid heating medium such as hot oil through the roller.For this purpose the roller is made hollow and its trunnions areconnected by shortpipes 3l (Fig. 1) into stuiilng boxes 3B.

The stuiing boxes 38 are formed on the inner ends of angularly bentmovable conduits 39 which extend back into axial alignment with theroller sub-frame pivot pins 24 and there enter swivel connections 4|formed on the machine ends of -stationary supply and return pipes 42,43. These pipes may connect with or lead to the same source of oil andto the same place of discharge as the oil pipes 34, 35 hereinbeforementioned. y

Rotation of the intaglioroller inthe adhesive bath is preferablyeffected by a gear 45 (Figs. 1, 2, 3, 4 and '1) which is mounted on oneof the roller trunnions 2|. The gear meshes with and is driven by apinion 46 which is mounted on an auxiliary drive shaft 41 journaled inbearings 48 formed in a gear casing-49 bolted to the machine'main frame25. The axis of shaft 41 is in alignment with the axis of the sub-framepivot pins 24. v

Within the casing 49 the shaft 41' carries a gear (Fig. 3) which mesheswith a gear 52 mounted on a short shaft 53 journaled in bearings formed4in the casing. Shaft 53 carries a bevel gear 54 which meshes with and isdriven by a driving bevel gear 55 mounted on a main drive shaft 56. Thedrive shaft is journaled in a bearing 51 in the gear casing and in abearing 58 in a' bracket 59 (Fig. 2)A securedto the machine base .26.This drive shaft may be rotated in any suitable manner.

Provision is made forvswinging the intaglio roller upwardly out of -theadhesive receptacle 28 when the machine is stopped in order to clean the-receptacle and also when the roller requires such cleaning. Since theserollers are rather heavy it would be extremely dimcult to handle therollers without some such provision which includes mechanical devicesfor easy manual actuation so that the shifting of the roller may beunder control at all times. For .this purpose the roller sub-frames 23carry segment rack gears 62 (Figs. 2, 4 and 7) which center around thepivot pins 24. v'Ihere is one of these rack gears on each subframe. l

Each rack gear meshes with a worm 63 mounted on an angularly disposedshaft 64 carried in bearings formed in a worm housing 66 secured to themachine base 26. 'I'he lower end of each shaft 64 carries a bevel gear61 which is disposed in a recess 68 in the. bottom of the worm housing.These two bevel gears mesh with similar gears 69 which are mounted on across-shaft 1| carried in bearings formed in the two worm housings. Theshaft extends across the machine and at one end is cutv away in a squareshank .whichvprojects beyond the housing and which is adapted to receivea crank handle 12.

'Ihus by manually turning the applied crank handle 12 the cross shaft 1|and its bevel gears 69 may be rotated. Rotation of these gears revolvesthe gears 61, worm shafts 64 and worms 63 and hence moves the segmentrack gears 62 and the sub-frames 23 on their pivot pins 24. By turningthe crank handle in the proper direction the roller carried on thesub-frames may be thus l raised out of the adhesive receptacle as shownin Fig. 4 where it is clear of the machine and free roller |I. Thisblade is carried in a carriage 1I (Figs. 5 and 6) which is located inthe adhesive receptacle 28. At each end, the carriage merges intd aninverted- U-shaped arm 16 which extends up out of the adhesivereceptacle, over the top, and down adjacent the outside wall of thereceptacle. At the terminal outer ends, the arms are formed withtrunnions 11 which are carried in the inner ends of a pair of swing arms18. The outer ends of the swing arms are mounted on a stationary crossshaft 19 which is carried in bearings 8| in the main side frames 25 ofthe machine.

When the doctor blade I5 is in its normal operating position in contactwith the intaglio roller |I,A the swing arms 18 are held down by boltsI2 which are threaded into the machine side frames. This holds thecarriage 15 against vertical movement. When it is desired to remove thecarriage and blade from the adhesive receptacle, the bolts are loosenedor taken out andthe unit may thereupon be swung upwardly and outwardlywith the swing arms 18 rocking on the cross shaft 18.

When in operating position the doctor blade |,5 is held against theintaglio roller. by pressure adjusting devices which are located one oneach side of the machine. Each of these devices includes apressure lever85 (Figf 1) which carries at itsv inner end a roller 86. The rollerbears against the adjacent U-shaped arm 16 of the carriage 15. The outerend of each pressure lever is engaged by the end of an adjusting screw81 whichv is threaded into a lug 88 formed on the machine side frame 25.A hand wheel 89 is proto work on. It may be just as easily returned tooperating position' within the receptacle. This roller shifting deviceprovides quickl and easy shifting of the roller and prevents removal ofthe roller from the machine when it is desired to gain access to theadhesive receptacle or to the roller itself.

vided on each. screw for turning it against its associated lever.

Intermediate the length of each pressure lever 85, a clamp rod 9| holdsthe lever in place in the machine side frames. Each rod is held underpressure of a compression spring 92 winch is coiled around the rod in arecess 93 formed in the side frames. A washer 94 and nut 95 on each rodbear against each spring and thus yieldablv hold the rod in place.

Provision is also made for shifting the doctor blade I5 longitudinallyof the intaglio roller as the latter rotates in the adhesive receptacle28..

'I'his is a usualpractice in adhesive applying machlnes. For thispurpose one of the doctor blade carriage trunnions 11 is formed with agroove |0| (Fig. 5) in which operates a head |02 of a reciprocatingslide |03. Such a connection between trunnion and slide is quicklydetachable and provides for easy raising of the carriage out, of theadhesive receptacle 28.

'Ihe slide |03 is carried in a suitable bearing |04 `formed in theadjacent side frame 25. The outer end of the slide carries a cam roller|06 which. operates in a. cam groove |01 of a barrel cam |08. The cam ismounted on a short shaft |09 journaled in a bearing in a cam housing ||2bolted to the machine side frame 25. 'I'he shaft extends beyond thebearing and carries a sprocket ||4 (Figs. 1, 2, 3, 4 and '1) which isrotated by an endless chain ||5. 'I'he chain is driven by a sprocket I6carried on an idler shaft ||1 journaled insuitable bearings'formed inthe machine side frames. The shaft ||1 also carries a sprocket |i8 whichis driven by achain lil. Chain |19 takes overa driving sprocket |2|carried on the auxiliary driving shaft 41 hereinbefore mentioned.

The doctor blade |5 hereinbefore mentioned is also mounted so that itmay be swung back out of the way to permit removal of the intaglio Thepressure roller |2 which holds the web of.

fibrous material A in engagement with the invl taglio roller is mounteddirectly above the This |pressure roller is formed with trunnions |25which are journaled in bearings |26'in vertically movable slides |21carried in slideways |28 formed in sub-frames or pivotal mountings |29.There are two of these sub-frames |29, one located adjacent each machineside frame 25 and they are connected to a rigid intervening hood |3|which extends over thepressure roller. An exhaust pipe or stack |32formed on the hood permits the escape of fumes adhesive receptacle. I V

.The two sub-frames |29 are carriedon a pivot shaft |35 (see also Figs.1, 2 and 4) which extends transversely of the machine. This shaft iscarand heat from the, l

in Fig. 4 or may be returned to operating position as shown in Fig. 2. i

It is thought that the invention and many of its attendant advantageswill be understood from the foregoing description, and it will beapparent that various changes may be madein the form, construction andarrangement of the parts Without departing from the `spiritand scope ofthe invention or sacrificing allof its material advantages, the formhereinheiore described being merely a preferred embodiment thereof.

We claim: 1. A coating machine for applying thermol plastic adhesive iniluid formto web material,

ried in bearings |36 formed in a rib section |31 15 Comprising inC0mbinati0n, a receptacle for holding the adhesive, heating means formaintaining of the machine side frames 25.

When the pressure roller I2 is in operating position against the web Apassing over the intaglio roller II, as best shown in Figs. 2, 3 and 6,

it is locked against displacement by a pair of latches |4I (see alsoFig. 4). These latches depend from a cross bar |42 which is carried inlugs |43 formed on the sub-frames |29. The lower ends of the latches areformed with hooks |45 which engage under shoulders |46 formed on 25 themachine side frames 25.

While in this locked position, the pressure roller I2 is forced downagainst the web A on the intaglio roller by pressure exerted throughcompressed air pressure devices |48 which are 30 Y located one on eachside of the machine. These devices exert their pressure against stems|49, each of which is connected with an adjacent slide |21. This shiftsthe slides in their slideways |28 and hence presses the roller carriedtherein against the web A.

The pressure roller I2 is rotated in unison with the intaglio roller II.This is brought about by a pair of meshing gears |5|, |52 which aremounted on the respective roller trunnions |25,

2 I. Hence as the intaglio roller I rotates it also revolves thepressure roller I2 in time with it, and preferably at the sameperipheral speed- As in the case of the intaglio roller provision isalso made for swinging the pressure roller I2 45 out of operatingposition so that the intaglio roller may be removed from the machine.This swinging of the pressureroller is performed independently of theintaglio roller. For this purpose the pressure roller sub-frame pivotshaft` 60 |35 carries a segment rack gear |55 (Figs. 1, 2 and 4) whichis in mesh with a worm |56 mounted on a vertical Worm shaft |51 cariedin bearings I58 formed in a, worm housing |59. The

housing is bolted to the adjacent machine side frame 25.

The lower end of the Worm shaft |51 carries a bevel gear I6| whichmeshes With a bevel gear |62 mounted on a cross shaft |63. This crossshaft also carries the freely rotating idler roller I3 which keeps theweb A taut as hereinbefore mentioned. Shaft |63 is carried in bearings|65 formed in the machine*` side- .frames 25. The free end of the shaftis formed with a square shank |66 (Fig. l) which is adapted to receiveo5 the crank handle 12 on other operating device.

Hence when the handle 12 is applied to the shank |66 of the shaft |63,turning of the shaft rotates the gears |6|, |62 and the worm |56. Ro-

tation of these parts rocks the segment rack gear 70 be lifted clear ofthe intaglio roller as shown 1l the adhesive in said receptacle in ailuid condition, a rotatable intaglio roller for removing the adhesivefrom the receptacle and for applying it to a web of material passed oversaid roller, a rotatable pressure roller disposed adjacent said intaglioroller for pressing the web of material against the intaglio roller,independent movable mountings for separately supporting said rollers,independent xed shafts `for respectively supporting said intaglio andpressure roller mountings, and means for independently bodily movingsaid rollers with their respective mountings on said shaftsindependently of one another and in opposite directions into and out ofoperating position relative to one another and to said adhesivereceptacle.

2. A coating machine for applying thermoplastic adhesive in iluid formto web material, comprising in combination, a receptacle for holding theadhesive, a rotatable intaglio roller for removing the adhesive from thereceptacle and for applying it to a web of material passed over saidroller, a rotatable pressure roller located adjacent said intaglioroller for pressing'the web of material against the intaglio roller,pivotal mountings supporting said rollers independently of each other, asegment gear connected with each of said mountings, a worm gear havingcooperation with each of said segment gears, and means for manuallyrotating said worm gears to shift said pivotal mountings and rollerscarried thereon into and out of operating position.

3. A coating machine for applying adhesive in iiuid form to webmaterial, comprising in combination, a receptacle'` for holding theadhesive, a rotatable intaglio roller for removing the adhesivetherefrom and for applying it to a web of material passed over saidroller, a pivotal mounting supporting said roller so that it may beswung into and out of operating position relative to said receptacle,and pivotally mounted inlet and outlet conduits connecting with saidroller for circulating a heating medium through the roller, saidconduits being adapted to shift with said roller when it is moved intoand out of operating position.

4. A coating machine for applying adhesive in iluid form to webmaterial, comprising in combination, a receptacle for holding theadhesive, a pivotally mounted rotatable intaglio roller for removing theadhesive from said receptacle and for applying it to a web of materialpassed over said roller, a pivotally mounted rotatable pressure rollerfor pressing the web of material against said intaglio roller, means forforcing said pressure roller against said intaglio roller, and means forbodily swinging said intaglio and pressure rollers on their pivotalmountings and in opposite directions into and out of operative positionrelative to eachother and to said adhesive receptacle.

5., A coating machine for applying adhesive in fluidform to webmaterial, comprising in combination, a, receptacle for holding theadhesive, a rotatable intaglio roller for removing the adhesive fromsaid receptacle and for applyingit to a web of material passed over saidroller, a rotatable pressure roller located adjacent said intaglioroller for pressing the web of material against said intaglio roller,.iixed shafts having movable frame mountings journaled thereon forsupporting said intaglio and pressure rollers independently of oneanother, and means for bodily and independently swinging said rollerframe mountings on said shafts to bodily move said rollers in arcuatepaths of travel and in opposite directions into and out of operatingposition relative to each other and to said adhesive receptacle. 6. Acoating machine for applying thermoplastic adhesive in ilid form to webmaterial,

comprising in combination, a receptacle for holding theY adhesive, arotatable intaglio roller for removing the adhesive from the receptacleand for applying it to a web of material passed over said roller, arotatable pressure roller disposed adjacent said intaglio roller forpressing the web of materialfagainst the intaglio roller, movable'aseaaio mountings supporting said rollers independently oi each other.and gearing means for bodily moving each or said rollers independentlyoi one another with their respective mountings in opposite directions inan arcuate'path of travel to a position laterally of their normallyoperative position relative to said receptacle. i

'7. A coating machine i'or applying thermoplastic adhesive in fluid formto web material, comprising in combination, a receptacle for holding theadhesive, a rotatable intaglio roller for removing the adhesive from thereceptacle and for applying it to a web of material passed over saidroller; a rotatable pressure roller disposed adjacent said intagliolroller for pressing the web of material against the' intaglio roller,movablemountlngs for independently supporting said rollers, means forbodily moving each oi said rollers independently oi one another and inopposite directions with their respective mountings into and out ofoperating position relative to said adhesive receptacle, and latchdevices for holding said mountings and said rollers carried therebyagainst displacement when the rollers are disposed in operativeposition'.

JOHN H. MURCH. RONALD E. J. NORDQUIST. ELOF NORDSTROM.

